A facing head includes a fixed part, couplable with a head of a machine tool via an interface plate and a rotary part, wherein a compartment is placed internally to which drive means and measurement means are housed for driving and measuring a radial slide supported by the rotary part so as to close the compartment, and at least one electric collector for controlling the drive means and measurement means. A continuous gasket contacts the radial slide and a fluid collector supplies the compartment with pressurized air to seal the compartment. The fluid collector includes a rotary portion with first fluid routes, and a fixed portion integral with the fixed part of the facing head with second fixed fluid routes together supplying the rotary part with a coolant, supplying the compartment with pressurized air, and transporting the oil for locking the radial slide.

A facing head as well as a method for inserting a tool into and/or removing a tool from a tool holder device of the facing head. The facing head has a spindle coupling device for exchangeably coupling with a spindle chuck of a working spindle of a machine tool. The facing head has a housing body at which or in which a facing slide is moveably supported in a guided manner. The facing slide supports the tool holder device. The tool holder device is hydraulically controllable. A hydraulic coupling that is mechanically and hydraulically coupled with an associated hydraulic control coupling of the housing body in a tool change position of the facing slide. Remote from the tool change position, the mechanical and hydraulic connection between the hydraulic coupling and the associated hydraulic control coupling is interrupted. In the tool change position a switching of the tool holder device between a hold condition holding the tool and a release condition releasing the tool can be carried out by a respective pressurization with hydraulic pressure.

There is described a facing accessory for a portable boring apparatus, the accessory comprising: a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis; a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least a telescopic arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft; and an actuator operatively connected to the second section of the telescopic section for translating the second section relative to the first section along the radial axis.

A boring tool includes a tool body rotatable around a central rotation axis. A slider member is arranged movably inside the tool body along a path extending transversely to the rotation axis. An insert pocket is associated with the slider member to move therewith and configured to receive a cutting insert with a cutting edge and which projects from the tool body transversely to the rotation axis. A motor member is connected to the slider member and controllable to move the slider member transversely to the rotation axis for changing the distance of the cutting edge to the rotation axis. The motor member is arranged inside the tool body together with the slider member in a cutting part of the tool body at a front end thereof. The motor member is arranged in parallel with the transversal extension of the slider member along said path.

A facing head (1) is here described comprising a fixed part (4), couplable with a head of a machine tool (2) via an interface plate (3), a rotary part (5), wherein a compartment (35) is placed internally to which drive means (100) and measurement means (101) are housed for driving and measuring a radial slide (6) which is supported by the rotary part (5) so as to close the compartment (35), and at least one electric collector suitable for transmitting the electrical signals for controlling the drive means (100) and measurement means (101) used for driving and measuring the radial slide (6). The facing head (1) comprises a continuous gasket (40), which is configured in such a way as to completely make contact with the radial slide (6) and is housed inside a respective recess (34) which externally surrounds the compartment (35), and a fluid collector, which is suitable for supplying the compartment (35) with pressurized air, so that the pressure inside the compartment (35) is higher than the atmospheric pressure, so as to seal the compartment (35). The fluid collector comprises a rotary portion (22), which is integral with the rotary part (5) of the facing head (1) and comprises first fluid routes (43) internally thereto, and a fixed portion (23), which is integral with the fixed part (4) of the facing head (1) and comprises, internally thereto, second fixed fluid routes (45) coupled with the first fluid routes (43) to supply the rotary part (5) with a coolant, to supply the compartment (35) with pressurized air, and to transport the oil necessary for automatically locking the radial slide (6).

A facing head as well as a method for inserting a tool into and/or removing a tool from a tool holder device of the facing head. The facing head has a spindle coupling device for exchangeably coupling with a spindle chuck of a working spindle of a machine tool. The facing head has a housing body at which or in which a facing slide is moveably supported in a guided manner. The facing slide supports the tool holder device. The tool holder device is hydraulically controllable. A hydraulic coupling that is mechanically and hydraulically coupled with an associated hydraulic control coupling of the housing body in a tool change position of the facing slide. Remote from the tool change position, the mechanical and hydraulic connection between the hydraulic coupling and the associated hydraulic control coupling is interrupted. In the tool change position a switching of the tool holder device between a hold condition holding the tool and a release condition releasing the tool can be carried out by a respective pressurization with hydraulic pressure.

There is described a facing accessory for a portable boring apparatus, the accessory comprising: a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis; a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least a telescopic arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft; and an actuator operatively connected to the second section of the telescopic section for translating the second section relative to the first section along the radial axis.

There is described a facing accessory for a portable boring apparatus, the accessory comprising: a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis; a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least a telescopic arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft; and an actuator operatively connected to the second section of the telescopic section for translating the second section relative to the first section along the radial axis.

A boring tool includes a tool body rotatable around a central rotation axis. A slider member is arranged movably inside the tool body along a path extending transversely to the rotation axis. An insert pocket is associated with the slider member to move therewith and configured to receive a cutting insert with a cutting edge and which projects from the tool body transversely to the rotation axis. A motor member is connected to the slider member and controllable to move the slider member transversely to the rotation axis for changing the distance of the cutting edge to the rotation axis. The motor member is arranged inside the tool body together with the slider member in a cutting part of the tool body at a front end thereof. The motor member is arranged in parallel with the transversal extension of the slider member along said path.

A finishing boring machine for a high-precision wheel hub hole, includes: a boring machine body, a hydraulic automatic centering fixture, a computer numerical control (CNC) vertical sliding table, a spindle box, a CNC facing head, a cutter assembly, and a hydraulic system. The boring machine body is a main structure of the finishing boring machine for the wheel hub hole. The hydraulic automatic centering fixture is configured to place a to-be-processed workpiece, and is arranged on the boring machine body. The CNC vertical sliding table is configured to control operation of the CNC facing head, and is arranged on the boring machine body. The spindle box is configured to control an operation speed of the CNC facing head, and is arranged on the CNC vertical sliding table. The CNC facing head is configured to control the cutter assembly to process the to-be-processed workpiece, and is arranged on the spindle box.